now give a nicer error if we can't open pools, rather than panicing; export a new zfs_zpool_collecterrors metric; handle the case where a zpool goes away by incrementing that metric rather than crashing.
now give a nicer error if we can't open pools, rather than panicing; export a new zfs_zpool_collecterrors metric; handle the case where a zpool goes away by incrementing that metric rather than crashing.

ncabatoff/zfs-exporter